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United States Patent | 5,143,180 |
Harper | September 1, 1992 |
A load lift truck having a vertically extendible mast adapted for longitudinal displacement along a length of the truck chassis is disclosed. The truck includes a carriage mounted on the mast adapted for lateral displacement along the mast. The carriage fitted with a load-carrying fork arrangement is adapted for angular rotation about a vertical axis. The truck is adapted for simultaneous operation of each of the aforesaid displacements and rotation thereby providing a means of maneuvering a load within a markedly smaller spatial environment with increased load.
Inventors: | Harper; Clark N. (8814 Oak Valley Dr., Sandy, UT 84093) |
Appl. No.: | 696248 |
Filed: | May 6, 1991 |
Current U.S. Class: | 414/629; 187/229; 414/631 |
Intern'l Class: | B66B 009/20 |
Field of Search: | 187/9 R,9 E,95 414/631,666,667,665,669,670,671,672 |
2900099 | Aug., 1959 | Cook | 187/9. |
3907141 | Sep., 1975 | Ahrendt et al. | 187/9. |
3937346 | Feb., 1976 | Laan | 187/9. |
Foreign Patent Documents | |||
3117803 | Nov., 1982 | DE | 414/631. |
1159708 | Jul., 1969 | GB | 414/631. |